Bring peaches and sugar to a boil over medium heat. Lower to a simmer, stirring until peaches begins to soften and mixture thickens, about 10 minutes. Break up some of the peaches as you stir. Let cool.

In the bowl of a stand mixer, whisk cream and salt until soft peaks begin to form. Add sweetened condensed milk and crème fraiche, whisking gently until thoroughly combined.

Fold in cooled peach jam, creating swirls within the cream. Be careful not to overmix. Pour mixture into a bowl or loaf pan and freeze 3 hours for soft serve or overnight for complete firmness.